Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Alaska’s STS → SEA flights land within a few points of 78% on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	STS	SEA	2h 03m	78%	1.9%	693	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Alaska + Deltatwo ticketsDetails →	STS 06:00 → LAX 07:44AS 3050 · flown by SkyWest	1h 56m Los Angeles	LAX 09:40 → SEA 12:30DL 1714	6h 34m	98%	88%
Alaska + Deltatwo ticketsDetails →	STS 07:00 → PDX 08:47AS 3417 · flown by SkyWest	2h 33m Portland	PDX 11:20 → SEA 12:36DL 3818 · flown by SkyWest	5h 36m	97%	87%
Alaska Details →	STS 17:35 → LAX 19:15AS 3466 · flown by SkyWest	1h 57m Los Angeles	LAX 21:12 → SEA 23:59AS 495	6h 24m	94%	86%
Alaska Details →	STS 08:30 → SNA 10:12AS 3287 · flown by SkyWest	1h 53m Santa Ana	SNA 12:05 → SEA 14:54AS 548	6h 24m	92%	83%
Alaska + Deltatwo ticketsDetails →	STS 12:05 → PDX 13:46AS 3009 · flown by SkyWest	1h 40m Portland	PDX 15:26 → SEA 16:40DL 4062 · flown by SkyWest	4h 36m	92%	82%
Alaska Details →	STS 14:17 → BUR 15:45AS 3092 · flown by SkyWest	2h 54m Burbank	BUR 18:39 → SEA 21:20AS 703	7h 03m	100%	77%
Alaska + Frontiertwo ticketsDetails →	STS 11:38 → LAX 13:18AS 3049 · flown by SkyWest	1h 57m Los Angeles	LAX 15:15 → SEA 18:26F9 1177	6h 38m	94%	75%
Southwest + Alaskatwo ticketsDetails →	STS 11:10 → BUR 12:40WN 3991	2h 12m Burbank	BUR 14:52 → SEA 17:34AS 537	6h 24m	98%	75%
Tight connection: often missed
Alaska Details →	STS 11:04 → SAN 12:50AS 3047 · flown by SkyWest	1h 09m San Diego	SAN 13:59 → SEA 16:58AS 465	5h 54m	69%	50%
Alaska Details →	STS 19:03 → PDX 20:36AS 2331 · flown by Horizon	54m Portland	PDX 21:30 → SEA 22:27AS 2421 · flown by Horizon	3h 24m	50%	44%
Alaska Details →	STS 17:56 → SAN 19:35AS 2257 · flown by Horizon	1h 00m San Diego	SAN 20:35 → SEA 23:41AS 1362	5h 45m	42%	28%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

LAX · 1h 16m · leaves 06:00 2%

BUR · 1h 11m · leaves 07:25 16%

Afternoon and evening

LAX · 54m · leaves 17:35 17%

PDX · 54m · leaves 19:03 50%

SAN · 1h 00m · leaves 17:56 58%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON